I get it—nobody wants to leave a park bench with a splinter in their hand or the back of their thigh. The short answer is yes: most reputable urban bench manufacturers do sand the wood before shipping. The longer answer is that sanding is only one part of the process.
In a typical production run, wooden slats are cut, planed, and then machine-sanded in stages. A good shop will start with a coarser grit to remove saw marks and then move to a finer grit to smooth the surface. They also ease the edges and corners, rounding them slightly, because sharp edges are where splinters usually begin. After sanding, many manufacturers apply a protective finish such as oil, stain, or a clear sealer. That helps lock down surface fibers and reduces weather-related roughening.
That said, wood is a natural material. A bench can leave the factory perfectly smooth but still develop raised grain, small cracks, or rough spots after months of rain, sun, and heavy use. This is why many cities now choose dense hardwoods, thermally modified wood, or non-wood materials like recycled plastic and metal for high-traffic areas. If you are really worried about splinters, composite or metal slat benches are usually the safest bet.
Before you sit, do a quick hand test: run your palm lightly over the seat slats, especially near knots, joints, and end grain. A well-finished bench should feel smooth, with no sharp edges or fuzzy fibers. Visible grain is normal; a rough or peeling surface is not. If a wooden bench looks dried out, gray, or cracked, it may be due for refinishing, and it is okay to choose another spot.
So yes, urban benches are generally sanded down before shipping. The best ones are also designed with rounded edges, sealed with a protective finish, and maintained over time to stay comfortable and splinter-free. If you want to be extra cautious, look for composite, recycled plastic, or metal benches, which avoid wood splinters altogether.